Measurement of the $b$-quark production cross-section in 7 and 13 TeV $pp$ collisions - INSPIRE

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Measurement of the $b$ -quark production cross-section in 7 and 13 TeV $pp$ collisions

LHCb

Collaboration

Dec 15, 2016

11 pages

Published in:

Phys.Rev.Lett. 118 (2017) 5, 052002,
Phys.Rev.Lett. 119 (2017) 16, 169901 (erratum)

Published: Feb 3, 2017

e-Print:

1612.05140 [hep-ex]

DOI:

10.1103/PhysRevLett.118.052002,
10.1103/PhysRevLett.119.169901 (erratum)

Report number:

CERN-EP-2016-201,
LHCB-PAPER-2016-031

Experiments:

CERN-LHC-LHCb

View in:

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Abstract: (APS)

Measurements of the cross section for producing b quarks in the reaction pp→bb¯X are reported in 7 and 13 TeV collisions at the LHC as a function of the pseudorapidity η in the range 2<η<5 covered by the acceptance of the LHCb experiment. The measurements are done using semileptonic decays of b-flavored hadrons decaying into a ground-state charmed hadron in association with a muon. The cross sections in the covered η range are 72.0±0.3±6.8 and 154.3±1.5±14.3 μb for 7 and 13 TeV. The ratio is 2.14±0.02±0.13, where the quoted uncertainties are statistical and systematic, respectively. The agreement with theoretical expectation is good at 7 TeV, but differs somewhat at 13 TeV. The measured ratio of cross sections is larger at lower η than the model prediction.

Note:

This version incorporates the Errata and presents only the updated measurements. Erratum added on Sept. 1, 2017. Please use for 13 TeV cross-sections and cross-section ratios. All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2016-031.html

p p: colliding beams
bottom: hadroproduction
bottom: pair production
inclusive reaction
bottom: particle identification
cross section: ratio: measured
p p: scattering
B: semileptonic decay
CERN LHC Coll
ground state

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Figures(15)

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